The idea behind this system is that the game will change seasons, lighting, and weather on a regular basis, and these conditions will affect combat and strategic planning. Movement will be hampered by rain, for instance, and visibility by fog and blizzards. In addition, some NPCs will change their activities based on the weather, and some mobs will only come out in the daytime or nighttime.
The team also reports that it's completed a "major overhaul" of its animations. Gloria Victis is still seeking crowdsourcing capital and is nearing pre-alpha stats.
[Source: Black Eye Games press release]